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This paper proposes an image registration scheme using multiple two-dimensional (2-D) barcodes. The proposed scheme never requires any reference image which correspond to the image to be compensated, whereas correlation-based schemes require a reference image such as the original image. The proposed scheme superimposes three 2-D barcodes on an original image, whereas one barcode is used in ordinary...
Watching a reflection in a glass window, one can often observe a multi-layered image consisting of a front-surface reflection from the glass and a rear-surface reflection through the glass. That multi-layered image is a composition of dual aspects of the same image, resembling a sound reverberation. As described herein, we propose a method to estimate the original reflection image before the layering...
A novel method of watermarking in image spatial domains is proposed in this paper. The level transformation previously proposed for embedding watermark bits into each pixel of a source image is used adaptively with estimating the resulting subjective image quality. Thus, a desired subjective quality can be achieved on the watermarked image. First, the measurements of image quality by subjective evaluations...
In this paper, we propose a velocity sensor for agricultural vehicles by sensing ground motion with robust image matching algorithm called Orientation Code Matching (OCM). The sensor performs velocity measurement with high accuracy and robustness without error by slipping in the fields. The algorithm of OCM is implemented on a Field Programmable Gate Array (FPGA) to perform real-time image matching...
Inverting signal bits is a basic operation for digital signal processing such as watermarking. A transformation from an input level to an output level that performs all the following three functions has been proposed in the previous papers: first, inverting a chosen bit; second, minimizing level change caused by the inversion; and last, varying the resultant transformed levels randomly by a stochastic...
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